1. Archival Sources
2. Klauder Louis T. and Associates, Office of High Speed Ground Transportation Job Files, Accession 2609, Manuscripts and Archives Department, Hagley Museum and Library, Wilmington, Delaware.
3. B Robert. Watson Professional Papers, Accession 2577, Manuscripts and Archives Department, Hagley Museum and Library, Wilmington, Delaware.
4. General Records of the United States Department of Transportation, Record Group 398, National Archives and Records Administration, College Park, Maryland.
5. Published Sources